<template>
  <view class="login-container">
    <!-- 提示登录的图标 -->
    <uni-icons type="contact-filled" size="100" color="#AFAFAF"></uni-icons>
    <!-- 登录按钮 -->
    <button type="primary" class="btn-login" open-type="getUserInfo" @getuserinfo="getUserInfo">一键登录</button>
    <!-- 登录提示 -->
    <view class="tips-text">登录后尽享更多权益</view>
  </view>
</template>
<script>
  import { mapMutations, mapState } from 'vuex'
  export default {
    data() {
      return {
        
      };
    },
    computed: {
      ...mapState('m_user',['redirectInfo']),
    },
    methods: {
      ...mapMutations('m_user',['updateUserInfo','updateToken','updateRedirectInfo']),
      //获取微信用户的基本信息
      getUserInfo(e) {
        //判断是否获取用户信息成功
        if(e.detail.errMsg ==='getUserInfo:fail auth deny') return uni.showToast({title: '您取消了登录权限！', icon: 'none', duration: 2000});
        //获取成功，则
        // console.log(e.detail.userInfo)
        this.updateUserInfo(e.detail.userInfo)
        
        //获取登录成功后的 Token 字符串
        this.getToken(e.detail)
      },
     async getToken(info) {
       const res = await uni.login()
       if (res.errMsg === 'login:ok') {
         // 登录成功，拿 code 换 token
         const code = res.code
       } else {
         // 登录失败
         console.error('登录失败')
         if(res.errMsg !== 'login:ok') return uni.showToast({title: '登录失败！', icon: 'none', duration: 2000});
       }
       

     //准备参数对象
     const query = {
       code: res.code,
       encryptedData: info.encryptedData,
       iv: info.iv,
       rawData: info.rawData,
       signature: info.signature
     }

     // 换取 token
       const { data: loginResult} = await uni.$http.post('https://api-hmugo-web.itheima.net/api/public/v1/users/wxlogin',query)
       //console.log(loginResult.meta.status)
       if(loginResult.meta.status !== 200)
           return uni.showToast({title: '登录失败！',icon: 'none', duration: 2000 });
        
       uni.showToast({title: '登录成功！',icon: 'none', duration: 2000 });
       console.log(loginResult)
       
       this.updateToken(loginResult.message.token)
       
       this.navigateBack()
       
      },
      navigateBack() {
        if(this.redirectInfo && this.redirectInfo.openType === 'switchTab') {
          uni.switchTab({
            url: this.redirectInfo.from,
            complete: () => {
              this.updateRedirectInfo(null)
            }
          })
        }
      }
      
    }
  }
</script>
<style lang="scss">
  .login-container {
    height: 750rpx;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #f8f8f8;
    position: relative;
    overflow: hidden;
    
    // 绘制登录盒子底部的半椭圆造型
      &::after {
        content: ' ';
        display: block;
        position: absolute;
        width: 100%;
        height: 40px;
        left: 0;
        bottom: 0;
        background-color: white;
        border-radius: 100%;
        transform: translateY(50%);
      }
    .btn-login {
      width: 90%;
      border-radius: 100px;
      margin: 15px 0;
      background-color: #c00000;
    }
    .tips-text {
      font-size: 12px;
      color: gray;
    }
  }
</style>